12 results
Perilunate Dislocation
On lateral wrist XR, the capitate ("apple") should sit in the lunate ("tea cup") which
onto outstretched hand ... extension • ... fracture, median nerve ... #XRay #Diagnosis ... #Sports #MSK
Triquetral Fracture
The triquetrum is the second most commonly fractured carpal bone. Look for the "pooping duck
dorsum of the hand ... flexion and extension ... dislocation, distal radius ... #XRay #Diagnosis ... #Sports #MSK
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
musculocutaneous) • Extension ... C7 (median) • Extension ... C8 (median) • Extension ... nerve in the radial ... Carpal Tunnel Syndrome
Synkinetic Wrist Extension Maneuver demonstrating Radial Nerve Palsy as cause for Wrist Drop

Up up, down down.
Extension Maneuver ... extension can be ... the fist leads extension ... #Extension #Maneuver ... #Radial #Nerve
Scapholunate Dissociation
The spacing between all carpal bones should be 1-2 mm, look for the "Terry Thomas"
onto outstretched hand ... extension • Possible ... injuries: distal radius ... #Radiology #XRay ... Orthopedics #Sports #MSK
Distal Radius Fracture 
Distal radius fracture is the most common orthopedic injury. Here's a quick summary.
•
variable gross wrist ... fracture, median nerve ... injury, acute carpal ... Distal #Radiology #XRay ... #Orthopedics #MSK
Mallet Finger
Absence of a fracture does NOT exclude Mallet finger, the extension function of the DIP
Mallet finger, the extension ... immobilize • Splint: Extension ... Finger #Radiology #XRay ... #Hand #Orthopedics ... #MSK
Inverted Supinator Test

Useful for identifying a lesion at the C5-C6 spinal cord level.  Tapping the
identifying a lesion ... extension and wrist ... Video by Mujtaba ... neurology #clinical #video ... #orthopedics #msk
Interphalangeal Joint Dislocation
Interphalangeal joint dislocations almost always occur dorsally, look for associated avulsion fractures! Here's a
phalanx to enable extension ... phalanx to enable extension ... tendon) • ED ... IPJoint #Radiology #XRay ... #MSK
Spurling's Test for Cervical Nerve Root Compression

With the neck in slight extension, ipsilateral flexion and rotation,
neck in slight extension ... ipsilateral flexion and ... rotation, provide an axial ... Radiculopathy #clinical #video ... #physicalexam #msk